[that's about the same look nick had on her face when she opened the package and started sorting through the contents. she takes a bite of her donut and shrugs while chewing.]

Best guess Mello could come up with was it wanted more data on us - wanted to observe us like we're some kinda science experiment. Personally, I'd guess it's because it just likes to fuck with us, but I'm probably biased, based on the kinda shit I saw in Hadriel. I dunno if a city-running AI's got emotion chips that need to be charged up, but I wouldn't be surprised.